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Stevens Institute of Technology

Estimate the Circumference of the Earth
using Eratosthenes' Method

Student Learning Objectives

For this RWLO, the student will be able to:
  • Determine the angle of a shadow that is cast by the Sun using a meter stick and trigonometry.

  • Use proportional strategies to estimate the circumference of the Earth using Eratosthenes’ calculations and method.
  • Demonstrate the relationship between the sun angle at two locations and the central angle.




(NOTE: this RWLO is based on the Noon Day Project)

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